当我在Python3.5中启用异步调试时,几乎每秒钟都会收到这样的消息:
INFO:asyncio:poll 999.470 ms took 1001.159 ms: timeout
INFO:asyncio:poll 999.264 ms took 1001.092 ms: timeout
INFO:asyncio:poll 999.454 ms took 1001.059 ms: timeout
下面是一个最小的代码,它再现了这个问题:
import asyncio
import logging
logging.basicConfig(level=logging.DEBUG)
loop =
我正在尝试使用rawsocket作为使用autobahn-python客户端和crossbar服务器的传输模式(不工作,也不建立连接) DEBUG:file_uploader.spEm_PreFile:Logger Started in Debug mode
DEBUG:asyncio:Get address info dev4-dv.davinci-onsite.com:443, type=<SocketKind.SOCK_STREAM: 1>
DEBUG:asyncio:Getting address info dev4-dv.davinci-onsite.com:443,
为什么asyncio.gather不能使用生成器表达式?
import asyncio
async def func():
await asyncio.sleep(2)
# Works
async def call3():
x = (func() for x in range(3))
await asyncio.gather(*x)
# Doesn't work
async def call3():
await asyncio.gather(func() for x in range(3))
# Works
async def call3():
我有一个asyncio.Task,我需要在一段时间后取消。在取消之前,任务需要做一些清理。根据文档,我应该只能调用task.cancel或asyncio.wait_for(coroutine, delay)并在协程中拦截asyncio.TimeoutError,但下面的示例不起作用。我尝试过截取其他错误,并调用task.cancel,但都没有成功。我是不是误解了取消任务的方式?
@asyncio.coroutine
def toTimeout():
try:
i = 0
while True:
print("iteration ", i,
来自python的asyncio示例: import asyncio
import time
def blocking_io():
print(f"start blocking_io at {time.strftime('%X')}")
# Note that time.sleep() can be replaced with any blocking
# IO-bound operation, such as file operations.
time.sleep(1)
print(f"blocking_io
我的Python版本是3.6.1。
我写了一些东西来用Python异步实现消费者生产者的模型。但这不像预期的那样有效。
四个事件都创建了,但没有任何打印输出。
async def consumer(queue, id):
while True:
val = await queue.get()
print('{} get a val: {}'.format(id, val))
await asyncio.sleep(1)
async def producer(queue, id):
for i in range(5
我正在尝试使用asyncio.create_subprocess_exec启动一组子进程:
procs = []
for i in range(5):
proc = await asyncio.create_subprocess_exec(...)
procs.append(proc.wait())
# doesn't work with this line either:
procs.append(asyncio.create_task(proc.wait()))
await asyncio.wait(*procs,..)
# doesn't